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<h1 class="ltx_title ltx_title_section">Image filtering and feature enhancement</h1>

<div id="Sx1.p1" class="ltx_para">
<p class="ltx_p">Image filtering and feature enhancement is one of the first steps
in many image processing applications. For this purpose, ThunderSTORM
provides several low-pass and band-pass convolution-based image filters.
Users may also choose not to use a filter and leave the input data
as it is for further processing.</p>
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<li id="I1.ix1" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize"><em class="ltx_emph">Input:</em></span> 
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<p class="ltx_p">A raw image <img id="I1.ix1.p1.m1" class="ltx_Math" style="vertical-align:-2px" src="mi/mi39.png" width="13" height="16" alt="I"> of size <img id="I1.ix1.p1.m2" class="ltx_Math" style="vertical-align:-3px" src="mi/mi45.png" width="52" height="15" alt="m\times n"> pixels.</p>
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<li id="I1.ix2" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize"><em class="ltx_emph">Output:</em></span> 
<div id="I1.ix2.p1" class="ltx_para">
<p class="ltx_p">A filtered image <img id="I1.ix2.p1.m1" class="ltx_Math" style="vertical-align:-2px" src="mi/mi60.png" width="18" height="16" alt="F"> of size <img id="I1.ix2.p1.m2" class="ltx_Math" style="vertical-align:-3px" src="mi/mi45.png" width="52" height="15" alt="m\times n"> pixels.</p>
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<h2 class="ltx_title ltx_title_subsection">See also</h2>

<div id="Sx1.SSx1.p1" class="ltx_para">
<ul id="I2" class="ltx_itemize">
<li id="I2.i1" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i1.p1" class="ltx_para">
<p class="ltx_p"><a href="../EmptyFilter.html" title="" class="ltx_ref">No filter</a></p>
</div>
</li>
<li id="I2.i2" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i2.p1" class="ltx_para">
<p class="ltx_p"><a href="BoxFilterUI.html" title="" class="ltx_ref">Averaging (Box) filter</a></p>
</div>
</li>
<li id="I2.i3" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i3.p1" class="ltx_para">
<p class="ltx_p"><a href="GaussianFilterUI.html" title="" class="ltx_ref">Gaussian filter</a></p>
</div>
</li>
<li id="I2.i4" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i4.p1" class="ltx_para">
<p class="ltx_p"><a href="LoweredGaussianFilterUI.html" title="" class="ltx_ref">Lowered Gaussian filter</a></p>
</div>
</li>
<li id="I2.i5" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i5.p1" class="ltx_para">
<p class="ltx_p"><a href="DifferenceOfGaussiansFilterUI.html" title="" class="ltx_ref">Difference-of-Gaussians filter</a></p>
</div>
</li>
<li id="I2.i6" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i6.p1" class="ltx_para">
<p class="ltx_p"><a href="DifferenceOfBoxFiltersUI.html" title="" class="ltx_ref">Difference of averaging (box) filters</a></p>
</div>
</li>
<li id="I2.i7" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i7.p1" class="ltx_para">
<p class="ltx_p"><a href="CompoundWaveletFilterUI.html" title="" class="ltx_ref">Wavelet filter</a></p>
</div>
</li>
<li id="I2.i8" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i8.p1" class="ltx_para">
<p class="ltx_p"><a href="MedianFilterUI.html" title="" class="ltx_ref">Median filter</a></p>
</div>
</li>
<li id="I2.i9" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i9.p1" class="ltx_para">
<p class="ltx_p"><a href="Convolution.html" title="" class="ltx_ref">Convolution</a></p>
</div>
</li>
<li id="I2.i10" class="ltx_item" style="list-style-type:none;">
<span class="ltx_tag ltx_tag_itemize">•</span> 
<div id="I2.i10.p1" class="ltx_para">
<p class="ltx_p"><a href="../../detectors/Threshold.html" title="" class="ltx_ref">Threshold selection</a> for <a href="../../detectors/Detectors.html" title="" class="ltx_ref">approximate localization of molecules</a></p>
</div>
</li>
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